WO2019123837A1 - Dispositif de commande d'émission, procédé de commande d'émission, dispositif de commande de réception, procédé de commande de réception, et système de transmission de signal - Google Patents

Dispositif de commande d'émission, procédé de commande d'émission, dispositif de commande de réception, procédé de commande de réception, et système de transmission de signal Download PDF

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Publication number
WO2019123837A1
WO2019123837A1 PCT/JP2018/040077 JP2018040077W WO2019123837A1 WO 2019123837 A1 WO2019123837 A1 WO 2019123837A1 JP 2018040077 W JP2018040077 W JP 2018040077W WO 2019123837 A1 WO2019123837 A1 WO 2019123837A1
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WIPO (PCT)
Prior art keywords
channel
transmission
control
control signal
unit
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PCT/JP2018/040077
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English (en)
Japanese (ja)
Inventor
一彰 鳥羽
山本　真也
寛 森田
Original Assignee
ソニー株式会社
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Publication date
Application filed by ソニー株式会社 filed Critical ソニー株式会社
Priority to CN201880080488.XA priority Critical patent/CN111466120B/zh
Priority to JP2019560845A priority patent/JP7136125B2/ja
Priority to US16/770,861 priority patent/US11245955B2/en
Publication of WO2019123837A1 publication Critical patent/WO2019123837A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
    • H04N21/43632—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wired protocol, e.g. IEEE 1394
    • H04N21/43635—HDMI
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G5/006—Details of the interface to the display terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44227—Monitoring of local network, e.g. connection or bandwidth variations; Detecting new devices in the local network
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/08—Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2350/00—Solving problems of bandwidth in display systems
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/12—Use of DVI or HDMI protocol in interfaces along the display data pipeline

Definitions

  • the present disclosure relates to a transmission control device, a transmission control method, a reception control device, a reception control method, and a signal transmission system.
  • HDMI high-definition multimedia interface
  • Display Port and the like may be used as a communication interface standard for transmitting digital signals such as video signals and audio signals.
  • digital signals mainstorms
  • video and audio signals and control signals for a main stream are transmitted in parallel between two devices.
  • the communication quality in the channel (main channel) transmitting the main stream may be degraded. Therefore, for example, even when the communication quality in the main channel is degraded, a technique capable of continuing the transmission of the main stream without delaying or interrupting the transmission of the main stream is disclosed. (See, for example, Patent Document 1).
  • the main stream and the control signal are transmitted in parallel between the two devices, even if the communication quality of the control signal is degraded, the main stream can be transmitted without interruption of the main stream transmission. It is desirable to provide a technology that can continue transmission.
  • the channel change request transmitted from the receiving device is detected when it is detected that the communication quality of the control signal transmitted by the first channel and received by the receiving device is worse than the first quality.
  • a transmission control device is provided.
  • the channel change request transmitted from the receiving device is detected when it is detected that the communication quality of the control signal transmitted by the first channel and received by the receiving device is worse than the first quality. And C., and initiating transmission of the control signal to the receiver by a second channel different from the first channel when the channel change request is acquired; And stopping transmission of the control signal by the first channel when a predetermined condition is satisfied after transmission of the control signal by the second channel is started. Is provided.
  • a channel change request to the transmitting device is detected.
  • An information providing unit for providing the control signal, and the control signal is transmitted from the transmitting device by the second channel different from the first channel based on the channel change request and received by the receiving device;
  • a reception control device is provided, wherein the transmission is stopped.
  • a channel change request to the transmitting device is detected. And when the control signal is transmitted from the transmitting device and received by the receiving device by a second channel different from the first channel by the processor based on the channel change request. Acquiring the control signal, and transmission of the control signal by the first channel when predetermined conditions are satisfied after transmission of the control signal by the second channel is started. And a reception control method is provided.
  • a signal transmission system having a transmission control device and a reception control device, wherein the transmission control device is a communication quality of a control signal transmitted by a first channel and received by a reception device.
  • An information acquiring unit for acquiring a channel change request transmitted from the receiving apparatus when it is detected that the quality is lower than the first quality; and the first channel when the channel change request is acquired
  • a transmission control unit for starting transmission of the control signal to the receiving apparatus by a different second channel, the transmission control unit being operable after transmission of the control signal by the second channel is started.
  • the transmission of the control signal by the first channel is stopped, and the reception control device transmits the first channel from the transmission device.
  • An information providing unit for providing the channel change request to the transmission device when it is detected that the communication quality of the control signal transmitted by the reception device and received by the reception device is worse than the first quality;
  • a reception control unit for acquiring the control signal when the control signal is started to be transmitted from the transmitting device by the second channel based on a channel change request and is received by the receiving device;
  • the main stream and the control signal are transmitted in parallel between two devices, even if the communication quality of the control signal is degraded, the transmission of the main stream is performed.
  • a technology is provided that allows the transmission of the main stream to continue without interruption. Note that the above-mentioned effects are not necessarily limited, and, along with or in place of the above-mentioned effects, any of the effects shown in the present specification, or other effects that can be grasped from the present specification May be played.
  • a plurality of components having substantially the same functional configuration are distinguished by attaching different numerals after the same reference numerals.
  • the same reference numeral is given.
  • similar components in different embodiments are distinguished by attaching different alphabets after the same reference numerals.
  • HDMI registered trademark
  • Display Port and the like may be used as a communication interface standard for transmitting digital signals such as video signals and audio signals.
  • a channel (main channel) for transmitting digital signals (main storm) such as video signals and audio signals and a channel for transmitting control signals are fixedly defined.
  • FIG. 1 is a diagram showing an example of the configuration of a signal transmission system 1-1 according to the first embodiment.
  • the signal transmission system 1-1 includes a communication device 10A-1 and a communication device 10B-1.
  • the communication device 10A-1 and the communication device 10B-1 are connected via the cable 60-1.
  • the communication device 10A-1 includes a transmitting unit Tx (1) for the control channel and a receiving unit Rx (2) for the control channel. Further, the communication device 10A-1 includes a transmission unit Tx (3) for redundant channel and a reception unit Rx (4) for redundant channel. In addition, the communication device 10A-1 includes a transmitting unit 50A-1 for redundant channel, a receiving unit 50A-2 for redundant channel, and a transmitting unit 50A-3 for redundant channel.
  • the communication device 10B-1 includes a control channel receiver Rx (1) and a control channel transmitter Tx (2).
  • the communication device 10B-1 also includes a redundant channel receiver Rx (3) and a redundant channel transmitter Tx (4).
  • the communication device 10B-1 includes a redundant channel receiver 50B-1, a redundant channel transmitter 50B-2, and a redundant channel receiver 50B-3.
  • the cable 60-1 includes main channels 20-1 to 20-2, control channels 30-1 to 30-2, and redundant channels (surplus channels) 40-1 to 40-2.
  • Main channels 20-1 to 20-2 are transmission paths for transmitting a main stream (content).
  • FIG. 1 shows the case where the number of main channels 20 is two.
  • the number of main channels 20 is not particularly limited. That is, the number of main channels 20 may be one or plural.
  • bi-directional communication is possible by the main channels 20-1 to 20-2.
  • only one-way communication may be possible by the main channels 20-1 to 20-2.
  • a video signal is treated as a main stream
  • other types of signals such as audio signals as mainstream, may be treated the same as video signals.
  • the main stream may be divided into a plurality of signals at the transmitting side and then transmitted, and may be received by the plurality of signals at the receiving side and then integrated into one main stream. Further, in the example shown in FIG. 1, the illustration of the receiver and transmitter of each of the main channels 20-1 to 20-2 is omitted.
  • the control channels 30-1 to 30-2 are transmission paths for transmitting control signals related to the main stream.
  • FIG. 1 shows the case where the number of control channels 30 is two.
  • the number of control channels 30 is not particularly limited. That is, the number of control channels 30 may be one or plural. Further, as shown in FIG. 1, bi-directional communication is possible by the control channels 30-1 to 30-2.
  • the control signal is a signal related to the main stream.
  • the signal related to the main stream is not particularly limited.
  • the signal related to the main stream may be additional data related to the main stream (eg, a profile of the main stream).
  • Redundant channels 40-1 to 40-2 are redundantly prepared transmission paths.
  • the redundant channels 40-1 to 40-2 are not used for communication unless there is a particular need, and may be used for communication if a need arises.
  • redundant channels corresponding to the receiving unit 50A-1 and the receiving unit 50B-1 redundant channels corresponding to the receiving unit 50A-2 and the receiving unit 50B-2, and the receiving unit 50A-3.
  • the illustration of redundant channels corresponding to the reception unit 50B-3 is omitted.
  • the control signal transmitted by the transmission unit Tx (1) in the communication device 10A-1 is received by the reception unit Rx (1) in the communication device 10B-1 via the control channel 30-1. Further, the control signal transmitted by the transmission unit Tx (2) in the communication device 10B-1 is received by the reception unit Rx (2) in the communication device 10A-1 via the control channel 30-2.
  • control signal transmitted by the control channel 30-1 is degraded.
  • transmission of a control signal by the transmission unit Tx (3) for redundant channel in the communication device 10A-1 is started.
  • the control signal is transmitted by the redundant channel 40-1, and is received by the reception unit Rx (3) for the redundant channel in the communication device 10B-1.
  • the transmission of the control signal by the control channel 30-1 may be stopped.
  • control signal transmitted by the control channel 30-2 is degraded.
  • transmission of a control signal by the transmission unit Tx (4) for redundant channel in the communication device 10B-1 is started.
  • the control signal is transmitted by the redundant channel 40-2, and is received by the reception unit Rx (4) for the redundant channel in the communication device 10A-1.
  • the transmission of the control signal by the redundant channel 40-2 may be stopped.
  • the main stream and the control signal are transmitted by an optical signal.
  • the main stream and control signals may be transmitted by other forms of signals, such as electrical signals.
  • the communication device 10A-1 can function as a "receiving device” and a "reception control device”.
  • the communication device 10B-1 can function as a “transmitting device” and a “transmission control device”.
  • the communication device 10A-1 can function as a “transmitting device” and a “transmission control device”.
  • the communication device 10B-1 can function as a "reception device” and a "reception control device”.
  • FIG. 2 is a diagram showing an example of a functional configuration of the communication device 10A-1 according to the first embodiment.
  • the communication device 10A-1 includes a switch unit 110A, a transmission signal control unit 120A-1, an information acquisition unit 130A-1, a transmission control unit 140A-1, a reception signal control unit 150A-1, and information provision.
  • the structure which transmits / receives a main stream is abbreviate
  • FIG. 3 is a diagram showing an example of a functional configuration of the communication device 10B-1 according to the first embodiment.
  • the communication device 10B-1 includes a switch unit 110B, a transmission signal control unit 120B-1, an information acquisition unit 130B-1, a transmission control unit 140B-1, a reception signal control unit 150B-1, and information provision.
  • the structure which transmits / receives a main stream is abbreviate
  • control signal x1 is transmitted from the communication device 10A-1 via the control channel 30-1, and is received by the communication device 10B-1.
  • control signal x2 is transmitted from the communication device 10B-1 via the control channel 30-2, and is received by the communication device 10A-1.
  • the operations of the communication device 10A-1 and the communication device 10B-1 at the time of transmission of the control signal x1 are the same as the operations of the communication device 10B-1 and the communication device 10A-1 at the time of transmission of the control signal x2. Therefore, in the following, the case where the control signal x2 is transmitted from the communication device 10B-1 through the control channel 30-2 and received by the communication device 10A-1 will be described as an example.
  • the transmission signal control unit 120B-1 recognizes that the control channel 30-2 is associated with the control signal x2 in advance, and transmits the control signal x2 connected to the control channel 30-2.
  • the switch unit 110B is controlled so as to be input to the unit Tx (2). Then, the switch unit 110B inputs the control signal x2 to the control channel 30-2 under the control of the transmission signal control unit 120B-1.
  • the transmission control unit 140B-1 controls transmission of the control signal x2 to the communication device 10A-1 by the control channel 30-2. More specifically, the transmission control unit 140B-1 activates the transmission unit Tx (2) connected to the control channel 30-2, so that the control signal x2 is transmitted to the communication device 10A-1 by the transmission unit Tx (2). The transmitter Tx (2) is controlled to be transmitted.
  • the transmission unit Tx (2) transmits the control signal x2 to the communication device 10A-1 through the control channel 30-2 under the control of the transmission control unit 140B-1. More specifically, when activated by the transmission control unit 140B-1, the transmission unit Tx (2) starts transmission of the control signal x2 to the communication device 10A-1.
  • the transmission unit Tx (2) includes an LDD (laser diode driver) and an LD (laser diode).
  • the LDD drives the LD
  • the LD outputs the control signal x2 input from the LDD to the control channel 30-2.
  • the control channel 30-2 is formed of an optical fiber
  • the LD converts the control signal x2 into an optical signal and transmits the optical signal to the communication device 10A-1.
  • the form of the control signal x2 is not limited.
  • the transmitting unit Tx (2) may transmit the control signal x2 to the communication device 10A-1 by an electric signal.
  • the other transmitters in the signal transmission system 1-1 that is, the transmitter Tx (1), the transmitter Tx (3), and the transmitter Tx (4) are also configured similarly to the transmitter Tx (2). May be done.
  • the reception control unit 170A-1 recognizes that the control channel 30-2 is associated in advance with the control signal x2, and transmits from the communication device 10B-1 by the control channel 30-2. Control the reception of the received control signal x2. More specifically, the reception control unit 170A-1 activates the reception unit Rx (2) connected to the control channel 30-2, so that the control signal x2 is transmitted from the communication device 10B-1 by the reception unit Rx (2). The receiver Rx (2) is controlled to be received.
  • the receiving unit Rx (2) receives the control signal x2 from the communication device 10B-1 via the control channel 30-2 under the control of the reception control unit 170A-1. More specifically, when activated by the reception control unit 170A-1, the reception unit Rx (2) starts receiving the control signal x2 from the communication device 10B-1.
  • the receiver Rx (2) includes a PD (photodetector) and an amplifier.
  • the PD receives the control signal x2 transmitted as an optical signal from the communication device 10B-1 and converts it into an electrical signal.
  • the control channel 30-2 is formed of an optical fiber and the PD receives the control signal x2 and converts it into an electric signal, but as described above, the communication device
  • the form of the signal transmitted from 10B-1 to the communication device 10A-1 is not limited.
  • the communication device 10A-1 may receive the control signal x2 from the communication device 10B-1 by an electrical signal.
  • reception unit Rx (1) the reception unit Rx (3), and the reception unit Rx (4) are also configured similarly to the reception unit Rx (2). May be done.
  • the reception signal control unit 150A-1 controls the switch unit 110A such that the control signal x2 received by the reception unit Rx (2) connected to the control channel 30-2 is output to the output destination corresponding to the control signal x2 . Then, the switch unit 110A outputs the control signal x2 to the output destination corresponding to the control signal x2 under the control of the reception signal control unit 150A-1.
  • control signal x2 transmitted by the control channel 30-2 is rapidly deteriorated.
  • control signal x2 is transmitted by optical communication or the like, it is known that there is a case where the communication quality of the control signal x2 rapidly deteriorates during transmission of the control signal x2 due to starvation of the optical device. .
  • the main stream (main stream transmitted by the main channel 20-2) controlled by using the control signal x2 is affected.
  • the control signal x2 is additional data or the like related to a main stream (for example, a main stream profile or the like)
  • the main stream is not normally processed in the communication device 10A-1 which has received the main stream.
  • control signal x2 transmitted by the control channel 30-2 is an important signal for the normal processing of the main stream. Therefore, while the control signal x2 is being transmitted, it is required that the communication quality of the control signal x2 be maintained.
  • control signal x2 is transmitted by the control channel 30-2 (first channel) from the transmission unit Tx (2) for the control channel in the communication device 10B-1, and for the control channel in the communication device 10A-1. Is received by the reception unit Rx (2). Then, it is assumed that the deterioration of the communication quality of the control signal x2 is detected by the control channel receiver Rx (2).
  • the deterioration of the communication quality of the control signal x2 can be detected by the communication quality of the control signal x2 being worse than a first threshold (first quality).
  • first quality any data may be used as the communication quality of the control signal x2.
  • the communication quality of the control signal x2 may be considered to be worse as the error rate of the control signal x2 is higher, and the communication quality of the control signal x2 is considered to be worse as the degree of decrease in the amplitude of the control signal x2 is larger. It is also good.
  • the information provision unit 160A-1 activates the transmission unit Tx (3) for the redundant channel facing the reception unit Rx (3) for the redundant channel in the standby state. Then, the information providing unit 160A-1 provides the communication device 10B-1 with a channel change request (hereinafter, also referred to as a “control channel change request”) via the transmission unit Tx (3) for redundant channel.
  • a channel change request hereinafter, also referred to as a “control channel change request”
  • the control channel change request also functions as the reception unit activation request.
  • the receiver activation request may be provided separately from the control channel change request.
  • the transmission of the control signal x2 by the control channel 30-2 may be continued.
  • the reception unit Rx (3) for the redundant channel in the standby state is activated by the reception of the control channel change request. Then, the information acquisition unit 130B-1 acquires a control channel change request.
  • the information providing unit 160B-1 determines in advance the communication device 10A- based on the status of the reception unit for the redundant channel (one or more) of the communication device 10A-1, which is grasped beforehand by the information exchanged at the time of connection establishment.
  • the reception unit for the redundant channel in the standby state that is, the state that can be activated from the communication device 10B-1 is detected.
  • the reception part Rx (4) for the redundant channel in the standby state is detected.
  • the reception unit for the redundant channel in the standby state may be detected by another method.
  • the reception unit for the redundant channel in the standby state may be designated by the communication device 10A-1 in the control channel change request.
  • the communication device 10A-1 may set the reception units for all redundant channels of the communication device 10A-1 in the standby state when transmitting the control channel change request.
  • the information provision unit 160B-1 activates the transmission unit Tx (4) for the redundant channel facing the reception unit Rx (4) for the redundant channel in the standby state. Then, the information provision unit 160B-1 provides channel change acceptance (hereinafter also referred to as "control channel change acceptance") to the communication device 10A-1 via the transmission unit Tx (4) for redundant channels.
  • control channel change acceptance also functions as a receiver activation request. However, the receiver activation request may be provided separately from the control channel change acceptance.
  • the reception unit Rx (4) for the redundant channel in the standby state is activated by the reception of the control channel change acceptance.
  • the reception device for the redundant channel in the standby state may be designated by the communication device 10A-1. .
  • the communication device 10A-1 can activate the reception unit Rx (4) for the redundant channel in the standby state by itself even if the control channel change acceptance is not received.
  • the information provision unit 160A-1 provides a duplicate request to the communication device 10B-1 via the transmission unit Tx (3) for redundant channel. That is, it is assumed here that the transmission of the control signal x2 by the control channel 30-2 is continued. Therefore, the transmission unit Tx (3) for the redundant channel requests the Duplicate request to transmit the control signal x2 to the communication device 10B-1 in parallel with the transmission of the control signal x2 by the control channel 30-2. Is transmitted to the communication device 10B-1.
  • the transmission control unit 140B-1 transmits the redundant channel transmission unit Tx ( The transmission of the control signal x2 to the communication device 10A-1 by the redundant channel 40-2 (second channel) is started via 4). Thereby, the transmission unit Tx (4) for redundant channel starts transmitting the control signal x2 to the communication device 10A-1 in parallel with the transmission of the control signal x2 by the control channel 30-2.
  • the transmission signal control unit 120B-1 transmits the control signal x2 to the redundant channel.
  • the switch unit 110B is controlled so as to be input to the redundant channel transmitter Tx (4) connected to 40-2 (second channel).
  • the transmission control unit 140B-1 controls the transmission unit Tx (4) such that transmission of the control signal x2 input to the transmission unit Tx (4) for redundant channel is started by the redundant channel 40-2. .
  • the reception control unit 170A-1 communicates with the communication device 10B-. 1. Reception of the control signal x2 transmitted from 1 by the reception unit Rx (4) for the redundant channel is started. Thereby, the reception unit Rx (4) for redundant channel starts receiving the control signal x2 from the communication device 10B-1 in parallel with the transmission of the control signal x2 by the control channel 30-2.
  • the reception control unit 170A-1 transmits a control signal whose transmission has been started.
  • the reception unit Rx (4) is controlled so that reception by the reception unit Rx (4) for the redundant channel connected to the x 2 redundant channel 40-2 is started.
  • the reception signal control unit 150A-1 controls the switch unit 110A so that the control signal x2 received by the redundant channel receiver Rx (4) is output to the output destination corresponding to the control signal x2.
  • the redundant channel receiver Rx (4) detects the communication quality of the control signal x2 received by itself. Then, when the reception unit Rx (4) for redundant channel detects that the communication quality of the control signal x2 received by itself is better than the second threshold (second quality), the information provision unit 160A-1 Provides the change success (transmission stop request) to the communication device 10B-1 via the transmission unit Tx (3) for the redundant channel.
  • the reception control unit 170A-1 is for the control channel via the control channel 30-2 when a predetermined condition is satisfied after reception of the control signal x2 by the reception unit for redundant channel Rx (4) is started. Stop the reception of the control signal x2 by the receiver Rx (2). More specifically, in the case where the change control is provided by the information providing unit 160A-1 via the transmission unit Tx (3) for the redundant channel, the reception control unit 170A-1 receives the control unit Rx for the control channel. The operation of (2) may be stopped. At this time, the reception control unit 170A-1 may also stop the operation of the transmission unit Tx (3) for redundant channels. This is expected to reduce power consumption.
  • the transmission control unit 140B-1 controls the control channel 30-. 2.
  • the transmission of the control signal x2 by the transmitter Tx (2) for the control channel via 2 is stopped. More specifically, in the case where the transmission control unit 140B-1 acquires a successful change via the redundant channel receiving unit Rx (3) by the information acquiring unit 130B-1, the transmission control unit 140B-1 for the control channel The operation of 2) may be stopped. At this time, the transmission control unit 140B-1 may also stop the operation of the reception unit Rx (3) for redundant channels. This is expected to reduce power consumption.
  • the communication quality of the control signal x2 transmitted from the communication device 10B-1 by the redundant channel 40-2 and received by the communication device 10A-1 is higher than the second threshold.
  • the predetermined condition is not limited to such a case.
  • the predetermined condition may be a condition that a predetermined time has elapsed since transmission of the control signal x2 is started by the transmission unit Tx (4) for redundant channel.
  • FIGS. 4 to 6 are flowcharts showing an example of the operation of the signal transmission system 1-1 according to the first embodiment.
  • an example of the operation of the communication device 10A-1 providing a control channel change request will be described with reference to FIGS. 4 to 6 (with appropriate reference to FIGS. 1 to 3), and then the control channel
  • An example of the operation of the communication device 10B-1 that acquires the change request will be described.
  • an example of the operation of the communication device 10A-1 providing the control channel change request will be described.
  • the information provision unit 160A-1 detects the reception unit for the redundant channel in the standby state among the reception units for the (one or more) redundant channels of the communication device 10B-1. For example, assuming that the information providing unit 160A-1 detects the reception unit Rx (3) for redundant channel in the standby state, the information provision unit 160A-1 for redundant channel facing the reception unit Rx (3) for redundant channel in the standby state.
  • the transmission unit Tx (3) of the above is activated (S15A). Then, the transmission unit Tx (3) for redundant channel provides a control channel change request to the communication device 10B-1 (S16A).
  • the redundant channel receiver Rx (4) in the standby state does not receive the control channel change acceptance (“No” in S22A)
  • the time since the control channel change request of S21A is provided.
  • the operation is shifted to a determination as to whether or not the waiting time for control channel change acceptance reception has elapsed.
  • the redundant channel receiver Rx (4) in the standby state is activated by the reception of the control channel change acceptance (S23A).
  • the transmitting unit Tx (3) for redundant channel transmits a Duplicate request to the communication device 10B-1 (S24A).
  • a redundant channel is generated.
  • the reception unit Rx (4) performs the control signal as Duplicate reception (reception of the same control signal as the control signal transmitted by the control channel 30-2) (S31A).
  • the redundant channel receiver Rx (4) confirms that the control signal received by itself and the control signal received via the control channel 30-2 are identical.
  • control signal received by the redundant channel receiver Rx (4) is the same as the control signal received via the control channel 30-2.
  • CRC Cyclic Redundancy Check
  • CRC attached to the control signal received by the reception unit Rx (4) for redundant channel and CRC attached to the control signal received via the control channel 30-2 are the same. It may be confirmed whether or not the control signals are the same depending on whether or not
  • the communication quality of the control signal received by the redundant channel receiver Rx (4) is OK, that is, if it is detected that the communication quality is better than the second threshold (the second quality). (“Yes” in S32A), the change success is transmitted by the transmitting unit Tx (3) for redundant channel (S33A), and the receiving unit Rx (2) for control channel and the transmitting unit Tx (3) for redundant channel The operation is stopped (S35A). This is expected to reduce power consumption.
  • the reception unit Rx (4) for the redundant channel in the standby state receives the control channel change request from the communication device 10A-1 (S16B), and is activated by the reception of the control channel change request (S17B). Then, based on the status of the reception unit for the redundant channel (one or more) of the communication device 10A-1, the standby of the reception units for the redundant channel of the communication device 10A-1 is performed by the information providing unit 160B-1.
  • the receiver for the redundant channel which is in the state (that is, the state that can be activated from the communication device 10B-1), is detected.
  • the reception unit Rx (4) for the redundant channel in the standby state is detected.
  • the redundant channel transmitter Tx (4) facing the redundant channel receiver Rx (4) in the standby state is activated (S17B).
  • the transmitter for redundant channel Tx (4) transmits control channel change acceptance.
  • the receiving unit Rx (3) for redundant channel receives the Duplicate request from the communication device 10A-1 (S24B).
  • the transmitter for redundant channel Tx (4) transmits Duplicate of the control signal based on the Duplicate request (transmission of the same control signal as the control signal transmitted by the control channel 30-2). Perform (S31B).
  • the redundant channel receiver Rx 3 And the redundant channel transmission part Tx (4) are shifted from the activated state to the standby state (S34B). This is expected to reduce power consumption.
  • the reception unit for redundant channel Rx (3) does not receive the change success (“No” in S33B)
  • the time after the start of the duplicate transmission of the control signal of S32B is for the change success reception.
  • the operation is shifted to the determination of whether or not the waiting time has elapsed.
  • the reception unit for redundant channel Rx (3) receives the change success (“Yes” in S33B)
  • FIG. 7 is a diagram showing an example of the configuration of a signal transmission system 1-2 according to the second embodiment.
  • the signal transmission system 1-2 includes a communication device 10A-2 and a communication device 10B-2.
  • the communication device 10A-2 and the communication device 10B-2 are connected via the cable 60-2.
  • the communication device 10A-2 includes a transmitting unit Tx (1) for the control channel and a receiving unit Rx (2) for the control channel.
  • the communication device 10A-2 may not include the transmission unit for the redundant channel and the reception unit for the redundant channel.
  • the communication device 10A-2 also includes main channel receiving units Rx (5) to Rx (8).
  • the communication device 10B-2 includes a reception unit Rx (1) for the control channel and a transmission unit Tx (2) for the control channel.
  • the communication device 10B-2 may not include the transmission unit for the redundant channel and the reception unit for the redundant channel.
  • the communication device 10B-2 also includes transmission units Tx (5) to Tx (8) for the main channel.
  • the cable 60-2 includes main channels 20-1 to 20-5 and control channels 30-1 to 30-2.
  • Main channels 20-1 to 20-5 are transmission paths for transmitting a main stream (content).
  • FIG. 7 shows the case where the number of main channels 20 is five.
  • the number of main channels 20 is not particularly limited as long as it is plural.
  • bi-directional communication is possible by the main channels 20-1 to 20-5.
  • only one-way communication may be possible through the main channels 20-1 to 20-5.
  • the main stream transmitted by the main channel 20, the control channel 30, and the control signal transmitted by the control channel 30 are as described above in the first embodiment. Note that, in the example shown in FIG. 7, the illustration of the receiver and transmitter of each of the main channels 20-1 to 20-5 is omitted.
  • control signal transmitted by the control channel 30-2 is degraded.
  • a part of the main channels 20-2 to 20-5 is changed to the control channel by the format change and the transmission structure change of the video signal transmitted by the main channels 20-2 to 20-5. Transmission of control signals is initiated by the control channel.
  • the main channel 20-5 is changed to the control channel, and the main channels 20-2 to 20-4 are maintained. The same process may be performed when the control signal transmitted by the control channel 30-1 is degraded.
  • the communication device 10A-2 can function as a "receiving device” and a "reception control device”. At this time, the communication device 10B-2 can function as a “transmitting device” and a “transmission control device”. On the other hand, the communication device 10A-2 can function as a “transmitting device” and a “transmission control device”. At this time, the communication device 10B-2 can function as a "reception device” and a "reception control device”.
  • FIG. 8 is a diagram showing an example of a functional configuration of the communication device 10A-2 according to the second embodiment.
  • the communication device 10A-2 includes a switch unit 110A, a transmission signal control unit 120A-2, an information acquisition unit 130A-2, a transmission control unit 140A-2, a reception signal control unit 150A-2, and information provision.
  • the configuration for transmitting the main stream via the main channel 20-1 is omitted from FIG.
  • FIG. 9 is a diagram showing an example of a functional configuration of the communication device 10B-2 according to the second embodiment.
  • the communication device 10B-2 includes a switch unit 110B, a transmission signal control unit 120B-2, an information acquisition unit 130B-2, a transmission control unit 140B-2, a reception signal control unit 150B-2, and information provision.
  • the configuration for receiving the main stream via the main channel 20-1 is omitted from FIG.
  • control signal x1 is transmitted from the communication device 10A-2 via the control channel 30-1, and is received by the communication device 10B-2.
  • control signal x2 is transmitted from the communication device 10B-2 via the control channel 30-2, and is received by the communication device 10A-2.
  • the operations of the communication device 10A-2 and the communication device 10B-2 at the time of transmission of the control signal x1 are the same as the operations of the communication device 10B-2 and the communication device 10A-2 at the time of transmission of the control signal x2. Therefore, in the following, a case where the control signal x2 is transmitted from the communication device 10B-2 via the control channel 30-2 and received by the communication device 10A-2 will be described as an example.
  • the transmission signal control unit 120B-2 recognizes that the control channel 30-2 is associated in advance with the control signal x2, and the transmission in which the control signal x2 is connected to the control channel 30-2
  • the switch unit 110B is controlled so as to be input to the unit Tx (2). Then, the switch unit 110B inputs the control signal x2 to the control channel 30-2 under the control of the transmission signal control unit 120B-2.
  • the transmission control unit 140B-2 controls transmission of the control signal x2 to the communication device 10A-2 by the control channel 30-2. More specifically, the transmission control unit 140B-2 activates the transmission unit Tx (2) connected to the control channel 30-2, so that the control signal x2 is transmitted to the communication device 10A-2 by the transmission unit Tx (2). The transmitter Tx (2) is controlled to be transmitted.
  • the transmission unit Tx (2) transmits the control signal x2 to the communication device 10A-2 via the control channel 30-2 under the control of the transmission control unit 140B-2. More specifically, when activated by the transmission control unit 140B-2, the transmission unit Tx (2) starts transmission of the control signal x2 to the communication device 10A-2.
  • the transmitter Tx (2) may be configured in the same manner as the transmitter Tx (2) according to the first embodiment.
  • the other transmitters in the signal transmission system 1-2 that is, the transmitters Tx (1) and Tx (5) to Tx (8) may be configured in the same manner as the transmitter Tx (2).
  • the reception control unit 170A-2 recognizes that the control channel 30-2 is associated in advance with the control signal x2, and transmits from the communication device 10B-2 by the control channel 30-2. Control the reception of the received control signal x2. More specifically, the reception control unit 170A-2 activates the reception unit Rx (2) connected to the control channel 30-2, so that the control signal x2 is transmitted from the communication device 10B-2 by the reception unit Rx (2). The receiver Rx (2) is controlled to be received.
  • the receiving unit Rx (2) receives the control signal x2 from the communication device 10B-2 via the control channel 30-2 under the control of the reception control unit 170A-2. More specifically, when activated by the reception control unit 170A-2, the reception unit Rx (2) starts reception of the control signal x2 from the communication device 10B-2.
  • the receiving unit Rx (2) may be configured in the same manner as the receiving unit Rx (2) according to the second embodiment.
  • the other reception units in the signal transmission system 1-2 that is, the reception units Rx (1) and reception units Rx (5) to Rx (8) may be configured in the same manner as the reception unit Rx (2).
  • the reception signal control unit 150A-2 controls the switch unit 110A such that the control signal x2 received by the reception unit Rx (2) connected to the control channel 30-2 is output to the output destination corresponding to the control signal x2 . Then, the switch unit 110A outputs the control signal x2 to the output destination corresponding to the control signal x2 according to the control by the reception signal control unit 150A-2.
  • the communication quality of the control signal x2 transmitted by the control channel 30-2 is rapidly degraded.
  • the communication quality of the control signal x2 transmitted from the communication device 10B-2 to the control channel 30-2 is degraded, part of the main channels 20-2 to 20-5 is released.
  • a method of switching the transmission channel of the control signal x2 seamlessly by mainly using it will be mainly described.
  • control signal x2 is transmitted from the transmission unit Tx (2) for the control channel in the communication device 10B-2 by the control channel 30-2 (first channel) to the communication device.
  • 10A-2 is received by the receiver Rx (2) for the control channel.
  • the control channel receiver Rx (2) it is assumed that the deterioration of the communication quality of the control signal x2 is detected by the control channel receiver Rx (2).
  • the information providing unit 160A-2 provides a control channel change request to the communication device 10B-2 via the control channel transmitter Tx (1). Even after the control channel change request is provided to the communication device 10B-2, the transmission of the control signal x2 by the control channel 30-2 may be continued.
  • the control channel receiver Rx (1) receives a control channel change request. Then, the information acquisition unit 130B-2 acquires a control channel change request.
  • the information provision unit 160B-2 receives the control channel change acceptance request from the communication device 10A-2 via the control channel transmitter Tx (2). provide.
  • the control channel receiver Rx (2) receives the control channel change acceptance, and the information acquisition unit 130A-2 acquires the control channel change acceptance.
  • the transmission control unit 140B-2 releases a part of the main channels 20-2 to 20-5 to which the main stream (video signals x5 to x8) is transmitted, and the control channel (second Use as a channel).
  • the control channel second Use as a channel.
  • part of the main channels 20-2 to 20-5 is released, the communication band used as the main channel 20 is lost by the part released, so the current format It is impossible to transmit the main stream (video signals x5 to x8) while maintaining the above.
  • the transmission control unit 140B-2 changes the transmission structure of the main stream transmission channel based on the format change and format change of the main stream (video signals x5 to x8) transmitted by the main channels 20-2 to 20-5.
  • part of the main channels 20-2 to 20-5 is released and used as a control channel (second channel).
  • the transmission control unit 140B-2 performs format change and transmission structure change based on the reception capability of the communication device 10A-2, the transmission capability of the communication device 10B-2, and the main stream (video signals x5 to x8). You may
  • bandwidth reduction without pixel clock change for example, 17% bandwidth reduction by making 12-bit pixels into 10-bit pixels
  • pixel clock reduction for example, frame rate reduction, change signal types to chrominance signals
  • FIG. 7 shows an example in which the main channel 20-5 is assigned to a new control channel as a part of the main channels 20-2 to 20-5 by the transmission control unit 140B-2.
  • the transmission control unit 140B-2 changes the format of the main stream transmitted by the main channels 20-2 to 20-5 via the transmission unit Tx (2) for the control channel (main channels 20-2 to 20- New stream format changed to be transmitted by 4) and transmission structure change of the transmission channel of the main stream (which video component is changed to be transmitted by which main channel 20) Provided to the communication device 10A-2.
  • the transmission control unit 140B-2 also provides the communication device 10A-2 with identification information (channel number) of the main channel 20-5 assigned as a new control channel.
  • identification information of a new control channel is included in the structure change notification, but identification information of a new control channel may be provided separately from the structure change notification.
  • the timing at which the notification of the identification information of the new control channel and the notification of the structure change are made is not particularly limited.
  • the notification of the identification information of the new control channel and the notification of the structure change notify the notification of the identification information of the new control channel and the notification of the structure change via the control channel 30-2 in which the deterioration of the communication quality is detected. It may be repeated until an indicated ACK signal is received. For example, it may be transmitted by an area (eg, blanking interval etc.) available for data transmission in the main stream (video signals x5 to x8) transmitted by the main channels 20-2 to 20-5.
  • the information acquisition unit 130A-2 acquires a structure change notification and identification information of a new control channel from the communication device 10B-2 via the control channel receiver Rx (2).
  • the reception control unit 170A-2 assigns the main channel 20-5 as a new control channel based on identification information of the new control channel.
  • the information providing unit 160A-2 provides the notification of assignment completion to the communication device 10B-2 via the transmission unit Tx (1) for the control channel.
  • the assignment completion notification is acquired by the information acquisition unit 130B-2 via the control channel receiver Rx (1).
  • the transmission control unit 140B-2 transmits the new control channel. Transmission of the control signal x2 to the communication device 10A-2 by the new control channel 20-5 (second channel) is started via the unit Tx (8). As a result, the transmitter Tx (8) for a new control channel starts transmitting the control signal x2 to the communication device 10A-2 in parallel with the transmission of the control signal x2 by the control channel 30-2.
  • the transmission signal control unit 120B-2 adds a new control signal x2.
  • the switch unit 110B is controlled to be input to the transmitter Tx (8) for a new control channel connected to the control channel 20-5 (second channel).
  • the transmission control unit 140B-2 controls the transmission unit Tx (8) such that transmission of the control signal x2 input to the transmission unit Tx (8) by the transmission unit Tx (8) is started.
  • the reception control unit 170A-2 transmits the notification signal to the communication device 10B.
  • -Reception of the control signal x2 transmitted from -2 by the receiver Rx (8) for a new control channel is started.
  • the receiver Rx (8) for a new control channel starts receiving the control signal x2 from the communication device 10B-2 in parallel with the transmission of the control signal x2 by the control channel 30-2.
  • the reception control unit 170A-2 controls the transmission to be started.
  • the receiver Rx (8) is controlled so that reception by the receiver Rx (8) for the new control channel linked to the new control channel 20-5 of the signal x2 is started.
  • the reception signal control unit 150A-2 controls the switch unit 110A such that the control signal x2 received by the new control channel receiver Rx (8) is output to the output destination corresponding to the control signal x2.
  • the receiver Rx (8) for the new control channel detects the communication quality of the control signal x2 received by itself. Then, when the receiving unit Rx (8) for the new control channel detects that the communication quality of the control signal x2 received by itself is better than the second threshold (the second quality), the information providing unit 160A -2 provides the change success to the communication device 10B-2 via the transmission unit Tx (1) for the control channel.
  • the reception control unit 170A-2 performs control via the control channel 30-2 when a predetermined condition is satisfied after transmission of the control signal x2 by the transmission unit Tx (8) for a new control channel is started.
  • the reception of the control signal x2 by the channel receiver Rx (2) is stopped. More specifically, in the case where the information control unit 170B-2 provides a successful change via the transmission unit Tx (1) for the control channel, the reception control unit 170B-2 receives the control unit Rx for the control channel.
  • the operation of (2) may be stopped. This is expected to reduce power consumption.
  • the transmission controller 140B-2 controls the control channel.
  • the transmission of the control signal x2 by the transmitting unit Tx (2) for the control channel via 30-2 is stopped. More specifically, in the case where the transmission control unit 140B-2 acquires a successful change via the reception unit Rx (1) for the control channel by the information acquisition unit 130B-2, the transmission control unit for the control channel Tx ( The operation of 2) may be stopped. This is expected to reduce power consumption.
  • the communication quality of the control signal x2 transmitted from the communication device 10B-1 by the new control channel 20-5 and received by the communication device 10A-2 is the second threshold.
  • the predetermined condition is not limited to such a case.
  • the predetermined condition may be a condition that a predetermined time has elapsed since the transmission of the control signal x2 is started by the transmitter Tx (8) for a new control channel.
  • FIGS. 10 to 12 are flowcharts showing an example of the operation of the signal transmission system 1-2 according to the second embodiment.
  • First, an example of the operation of the communication device 10A-2 providing a control channel change request will be described with reference to FIGS. 10 to 12 (also referring to FIGS. 7 to 9 as appropriate), and then the control channel will be described.
  • An example of the operation of the communication device 10B-2 that acquires a change request will be described.
  • an example of the operation of the communication device 10A-2 that provides the control channel change request will be described.
  • control channel transmitter Tx (1) provides the communication device 10B-2 with a control channel change request (S41A).
  • the control channel receiver Rx (2) does not receive the control channel change acceptance (“No” in S22A)
  • the time after the control channel change request of S21A is provided is the control channel change.
  • the operation is shifted to the determination of whether or not the waiting time for trust reception has passed.
  • the control channel receiving unit Rx (2) receives the control channel change acceptance ("Yes" in S22A)
  • the information acquiring unit 130A-2 receives the control channel receiving unit Rx (2). , And receives notification of structural change notification and identification information of a new control channel (S51A).
  • the reception control unit 170A-2 assigns the main channel 20-5 as a new control channel based on the identification information of the new control channel (S52A). Then, the control channel transmitter Tx (1) transmits an assignment completion notification to the communication device 10B-2 (S53A).
  • the new control channel receiver Rx (8) receives the control signal transmitted by the new control channel 20-5 (S61A).
  • the new control channel receiver Rx (8) confirms that the control signal received by itself and the control signal received via the control channel 30-2 are identical. The determination of the identity of the control signals may be made in the same manner as in the first embodiment.
  • the suspension procedure is executed (S64A). In the interruption procedure, the video format change and the transmission structure change may be undone, and the transmission of the control signal by the new control channel 20-5 may be stopped.
  • the communication quality of the control signal received by the receiver Rx (8) for the new control channel is OK, that is, it is detected that the communication quality is better than the second threshold (the second quality). If (Yes at S32A), the change success is transmitted by the control channel transmitter Tx (1) (S33A), and the operation of the control channel receiver Rx (2) is stopped (S35A). This is expected to reduce power consumption.
  • control channel receiving unit Rx (1) receives a control channel change request from the communication device 10A-2 (S41B).
  • the control channel transmitter Tx (2) transmits control channel change acceptance (S22B).
  • the transmission control unit 140B-2 changes the format of the main stream (video signals x5 to x8) transmitted by the main channels 20-2 to 20-5 and changes the transmission structure of the transmission channels, and releases the control.
  • a channel is assigned to a new control channel (S51B). After that, a notification of assignment completion is received from the communication device 10A-1 by the control channel receiver Rx (1) (S53B).
  • the transmitter Tx (8) for a new control channel transmits a control signal (transmits the same control signal as the control signal transmitted by the control channel 30-2) (S61B) ).
  • the suspension procedure is executed (S64B).
  • the video format change and the transmission structure change may be undone, and the transmission of the control signal by the new control channel 20-5 may be stopped.
  • An information acquiring unit for acquiring a channel change request transmitted from the receiving device; and the control signal to the receiving device by the second channel different from the first channel when the channel change request is acquired A transmission control unit for starting transmission, wherein the transmission control unit is configured to use the first channel when a predetermined condition is satisfied after the transmission of the control signal via the second channel is started.
  • a transmission control device is provided, which stops transmission of the control signal.
  • the transmission is detected when it is detected that the communication quality of the control signal transmitted from the transmission device by the first channel and received by the reception device is worse than the first quality.
  • the control signal is started to be transmitted from the transmitting device by the information providing unit for providing a channel changing request to the device and the second channel different from the first channel based on the channel changing request, and is received by the receiving device
  • a reception control unit for acquiring the control signal, and the first channel is satisfied when a predetermined condition is satisfied after the transmission of the control signal by the second channel is started.
  • a reception control device is provided, wherein the transmission of the control signal according to.
  • each functional block included in the communication device 10A-1 may be implemented in a separate IC (Integrated Circuit), or any combination may be implemented in the same IC.
  • the functional blocks included in the communication device 10A-2 may also be implemented in separate ICs, or any combination may be implemented in the same IC.
  • each functional block included in the communication device 10B-1 may be implemented in a separate IC, or any combination may be implemented in the same IC.
  • the functional blocks included in the communication device 10B-2 may also be implemented in separate ICs, or any combination may be implemented in the same IC.
  • the information acquiring unit is satisfied.
  • the transmission control unit stops transmission of the control signal through the first channel when the transmission stop request is acquired.
  • the transmission control unit uses a redundant channel as the second channel, The transmission control device according to (1) or (2).
  • the transmission control unit releases part of a plurality of channels through which content is transmitted and uses it as the second channel.
  • the transmission control unit releases part of the plurality of channels and uses it as the second channel by the format change of the content and the transmission structure change of the transmission channel of the content based on the format change.
  • the transmission control unit provides the receiving apparatus with a change notification indicating the format change and the transmission structure change.
  • the transmission control device according to (5). (7) The transmission control unit provides identification information of the second channel to the receiving device. The transmission control device according to any one of the above (1) to (6). (8) The transmission control device A transmission signal control unit configured to control the control signal to be input to a transmission unit connected to the second channel when the channel change request is acquired; The transmission control unit controls the transmission unit to start transmission of the control signal input to the transmission unit through the second channel when the channel change request is acquired. The transmission control device according to any one of the above (1) to (7).
  • Reception control for acquiring the control signal when the control signal is started to be transmitted from the transmitting device by the second channel different from the first channel based on the channel change request and received by the receiving device
  • Transmission of the control signal by the first channel is stopped when a predetermined condition is satisfied after transmission of the control signal by the second channel is started.
  • Reception control device (11)
  • the condition that the communication quality of the control signal transmitted by the second channel and received by the receiving device is better than the second quality is satisfied as the predetermined condition
  • the information providing unit is satisfied.
  • Providing a transmission stop request to the transmitting device When the transmission stop request is acquired by the transmission device, transmission of the control signal by the first channel is stopped by the transmission device.
  • the reception control device according to (10).
  • a redundant channel is used as the second channel, The reception control device according to (10) or (11). (13) As the second channel, part of a plurality of channels through which content is transmitted is released and used. The reception control device according to (10) or (11). (14) As the second channel, a part of the plurality of channels is released and used by a format change of the content and a transmission structure change of the transmission channel of the content based on the format change. The reception control device according to (13). (15) The reception control unit acquires, from the transmission device, a change notification according to the format change and the transmission structure change. The reception control device according to (14). (16) The reception control unit acquires identification information of the second channel from the transmission device. The reception control device according to any one of (10) to (15).
  • the reception control unit performs control such that reception by the reception unit connected to the second channel of the control signal started by the second channel is started.
  • the reception control device And a reception signal control unit configured to control the control signal received by the reception unit to be output to an output destination corresponding to the control signal.
  • the reception control device according to any one of (10) to (16).
  • (18) Providing a channel change request to the transmitting device when it is detected that the communication quality of the control signal transmitted from the transmitting device via the first channel and received by the receiving device is worse than the first quality;
  • the processor acquires the control signal when the control signal is transmitted from the transmitting device and received by the receiving device by a second channel different from the first channel based on the channel change request.
  • a signal transmission system comprising a transmission control device and a reception control device, the signal transmission system comprising: The transmission control device An information acquisition unit for acquiring a channel change request transmitted from the receiving device when it is detected that the communication quality of a control signal transmitted by the first channel and received by the receiving device is worse than the first quality; When, And a transmission control unit that starts transmission of the control signal to the receiving device by a second channel different from the first channel when the channel change request is acquired; The transmission control unit stops the transmission of the control signal by the first channel when a predetermined condition is satisfied after the transmission of the control signal by the second channel is started.
  • the reception control device When it is detected that the communication quality of the control signal transmitted from the transmitting device by the first channel and received by the receiving device is worse than the first quality, the channel change request is sent to the transmitting device
  • An information provider to provide A reception control unit that acquires the control signal when the control signal is started to be transmitted from the transmitting device by the second channel based on the channel change request and is received by the receiving device; Signal transmission system.
  • the information acquiring unit is satisfied. Obtaining a transmission stop request sent from the receiving device; The transmission control unit stops transmission of the control signal through the first channel when the transmission stop request is acquired.
  • the signal transmission system according to (19).

Abstract

Le problème décrit par la présente invention est de permettre, lorsqu'un flux principal et un signal de commande sont transmis simultanément entre deux appareils, la transmission du flux principal à continuer sans interruption même si la qualité de communication du signal de commande se détériore. La solution selon l'invention porte sur un dispositif de commande de transmission qui comprend : une unité d'acquisition d'informations pour acquérir, lorsqu'il est détecté qu'un signal de commande transmis à travers un premier canal et reçu par un dispositif de réception est inférieur en qualité de communication à une première qualité, une demande de changement de canal transmise par le dispositif de réception; et une unité de commande de transmission pour, si la demande de changement de canal est acquise, démarrer la transmission du signal de commande au dispositif de réception par l'intermédiaire d'un second canal qui est différent du premier canal. L'unité de commande de transmission arrête la transmission du signal de commande à travers le premier canal lorsqu'une condition prédéterminée est satisfaite suite au début de la transmission du signal de commande à travers le second canal.
PCT/JP2018/040077 2017-12-21 2018-10-29 Dispositif de commande d'émission, procédé de commande d'émission, dispositif de commande de réception, procédé de commande de réception, et système de transmission de signal WO2019123837A1 (fr)

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CN201880080488.XA CN111466120B (zh) 2017-12-21 2018-10-29 控制设备、控制方法和信号传输系统
JP2019560845A JP7136125B2 (ja) 2017-12-21 2018-10-29 送信制御装置、送信制御方法、受信制御装置、受信制御方法および信号伝送システム
US16/770,861 US11245955B2 (en) 2017-12-21 2018-10-29 Transmission control device, transmission control method, reception control device, reception control method, and signal transmission system

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CN111466120A (zh) 2020-07-28
CN111466120B (zh) 2022-07-22

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